40075398 has 80 divisors (see below), whose sum is σ = 100431936. Its totient is φ = 11838960.

The previous prime is 40075393. The next prime is 40075417. The reversal of 40075398 is 89357004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40075393) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 76365 + ... + 76887.

Almost surely, 2^40075398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40075398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50215968).

40075398 is an abundant number, since it is smaller than the sum of its proper divisors (60356538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40075398 is a wasteful number, since it uses less digits than its factorization.

40075398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 40075398 is about 6330.5132493345. The cubic root of 40075398 is about 342.2099357404.

The spelling of 40075398 in words is "forty million, seventy-five thousand, three hundred ninety-eight".